Ages 6 to 9 years. Karate is an action-packed martial art that is thrilling to watch! Kids will love learning how to safely perform the fast-paced karate moves highlighted in Karate in Action. Bold images and clear text will teach kids everything they need to know about the history, techniques, and competitions of the world's most popular martial art. Other topics include: katas and sparring; showing respect to the sensei and to others; the history and use of weapons in karate.